Will not start after replacing fuel pump and code 42

Tiny
ERICLEE
  • MEMBER
  • 1992 JEEP GRAND CHEROKEE LAREDO
  • 4.0L
  • V6
  • 4WD
  • MANUAL
  • 223,000 MILES
Replaced the fuel pump but now fuel gauge won't move at all. It won't start even if I put fuel straight in the carburetor. It show code 42 which is auto shut down. If the fuel gauge isn't coming on but that keep the engine from starting.
Saturday, January 4th, 2020 AT 9:55 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

The most common cause for this is the ECM itself as it controls the ASD.

I attached a test chart and diagram for you to view.

Roy
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Saturday, January 4th, 2020 AT 10:25 AM
Tiny
ERICLEE
  • MEMBER
  • 4 POSTS
Okay, now the check engine light and the shift indicator light stay lit up. I can no longer check for fault codes is this another sign of a bad ECM. Thank you for your time and advice it's greatly appreciated.
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Monday, January 6th, 2020 AT 6:53 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes, did you follow the flow chart?
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Monday, January 6th, 2020 AT 7:14 PM

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